Frequencies for first 10,000 rows of age_cod variable in demo2012q1 dataset :

       Unit |
abbreviatio |
      n for |
  patient's |
        age |      Freq.     Percent        Cum.
------------+-----------------------------------
        DEC |         13        0.13        0.13
         DY |         27        0.27        0.40
         HR |          2        0.02        0.42
        MON |         26        0.26        0.68
         WK |          1        0.01        0.69
         YR |      9,931       99.31      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Dec 2015